Abstract
Ag and Pt nanoparticles have successfully been synthesized by hydrolysis of eitherAg2Naor PtNa at room temperature. The oxidation of sodium in the Pt-Na pellets was much faster than that in the Ag-Na pellets since Pt is a catalyst forH2Oformation reaction from hydrogen and oxygen at room temperature. The hydrolysis byproduct, NaOH, has a high solubility and easily is removed. This method offers a simple method of preparing transition metal nanoparticles. The Ag and Pt nanoparticles prepared by this method were crystalline in nature, and spherical in shape with a mean size of around 10 nm.
Highlights
Transition metal nanoparticles have attracted considerable attention since they have unique catalysis, magnetism, and optical properties, and have great potential for use in chemical synthesis [1] and fuel cells [2]
The Ag and Pt nanoparticles prepared by hydrolysis of the Ag-Na or Pt-Na intermetallics were characterized in detail
Compared with the hydrolysis of magnides, the reaction byproduct, NaOH, has a high solubility and is removed. This method offers a simple method of preparing transition metal nanoparticles
Summary
Transition metal nanoparticles have attracted considerable attention since they have unique catalysis, magnetism, and optical properties, and have great potential for use in chemical synthesis [1] and fuel cells [2]. Mg(OH) was carefully removed using an acid, pure Ni nanoparticles were obtained [6]. Ag, and Au nanoparticles have been produced by hydrolysis of their magnides [7, 8]. Certain aluminides such as Al3Ni were shown to exhibit a similar hydrolysis behavior in water at room temperature [9]. Due to the chemical characteristics of Al(OH), including its low acidity, chemically active transition metal nanoparticles, such as Fe, Co, and Ni, cannot be produced by using dilute hydrochloric acid to remove Al(OH). The hydrolysis behavior of Ag-Na or Pt-Na intermetallics in water at room temperature was investigated. The Ag and Pt nanoparticles prepared by hydrolysis of the Ag-Na or Pt-Na intermetallics were characterized in detail
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